Genus Terthron Fennah, 1965

Museums

Regional Maps

• Terthron Fennah, R.G. 1965. Delphacidae from Australia and New Zealand (Homoptera: Fulgoroidea). Bulletin of the British Museum (Natural History) Entomology 17(1): 1-59 [55].

  Type species:

   Delphax anemonias Kirkaldy, 1907 by original designation.

Introduction

A genus currently containing two species, one of which is distributed in SE Asia extending into the northern parts of the Northern Territory and Queensland while the other is in Japan.

Distribution

States

Northern Territory, Queensland

IBRA and IMCRA regions

IBRA

NT, Qld: Arnhem Coast (ARC), Pine Creek (PCK), Wet Tropics (WT)

Diagnosis

Vertex as long medially as broad at base, subacutely rounding into frons, as wide at apex as at base, lateral margins straight or feebly concave, apical margin transverse with submedian carinae very feebly prominent, Y-shaped carina weakly present, submedian carinae uniting at apex of vertex, basal compartment of vertex wider at hind margin than greatest length (about 2 : 1); frons in middle line longer than wide at widest part (2 : 1), widest at middle, lateral margins shallowly convex, median carina simple, clypeus at base very slightly wider than frons at apex, postclypeal disc as long as broad at base, in profile very feebly convex, almost straight, entire clypeus in profile moderately convex; rostrum rather short, surpassing mesotrochanters but not attaining post-trochanters; antennae attaining level of frontoclypeal suture or slightly surpassing it, basal segment distinctly longer than broad, second segment longer than first (about 1.5 : 1); ocelli distinct, blemmata present. Pronotum with disc about as long in middle line as broad at anterior margin, lateral carinae straight, not quite attaining hind margin, not directed towards tegulae, but farther mesad. Post-tibial spur thin, shallowly tectiform with about twenty teeth (Fennah 1965).

Head including eyes narrower than pronotum. Vertex as wide or wider at base than long submedially, as wide at base as at apex, lateral carinae straight or concave, apical margin transverse, submedian carinae uniting at apex, Y-shaped carina weak, basal compartment wider at base than greatest length. Frons in midline about twice its maximum width, lateral carinae shallowly convex, single median carina. Postclypeus at base wider than frons at apex. Rostrum surpassing meso-trochanters, but not attaining meta-trochanters. Antennae cylindrical, surpassing frontoclypeal suture. Ocelli present. Pronotum lateral carinae not attaining hind margin. Spinal formula of hind leg 5-7-4. Posttibial spur with about 20 teeth. Anal segment of male short, ring-like, lateroapical angles widely separated, each produced into a long spinose process, in profile arising far below dorsal margin. Pygofer with opening as long as wide, lateral margins weakly defined, with or without medioventral process. Aedeagus laterally compressed, broad at base, ventral margin produced rod-like or triangularly. Suspensorium triangular oval or elongate with ventral ring-like. Diaphragm produced into a lobe, widening towards apex, dorsal margin slightly incised, surface beset with many granulations. Parameres widening towards truncate apex, inner margin sinuate (Bellis and Donaldson 2015).

ID Keys

Fennah 1965: 4

Diagnosis References

Bellis, G.A. & Donaldson, J.F. 2015. Reassessment of some of Kirkaldy's Australian species of Delphacini (Hemiptera: Delphacidae: Delphacinae). Austral Entomology 1-13 [First published on line 17 December 2015 with pagination 1–13. Print version published August 2016, vol 55(3), 247-260] [11]

Fennah, R.G. 1965. Delphacidae from Australia and New Zealand (Homoptera: Fulgoroidea). Bulletin of the British Museum (Natural History) Entomology 17(1): 1-59 [55–56]

History of changes